Question

If four moles of electrons are transferred from anode to cathode in a experiment on electrolysis of water, then total volume of the two gases produced at $STP$ will be:

• A. $224L$
• B. $72.6L$
• C. $67.2L$
• D. $89.4L$

Answer 1

The correct option is C $67.2L$

Equivalent volume of $H_2=11.2L$
Equivalent volume of $O_2=5.6L$
Volumes of $H_2$ and $O_2$ evolved by $4$ moles electrons or $4$ faraday charge $=4\times 11.2+4\times 5.6$

$=67.2L$.